Live Quiz Arena
🎁 1 Free Round Daily
⚡ Enter ArenaQuestion
← Human Body & HealthWhy does an elderly individual's muscle tissue exhibit reduced force generation compared to a younger person, even when stimulated with the same electrical signal?
A)Increased mitochondrial oxidative phosphorylation efficiency
B)Enhanced acetylcholine receptor sensitivity at synapses
C)Decreased excitation-contraction coupling efficiency due to aging✓
D)Elevated calcium reuptake rate into sarcoplasmic reticulum
💡 Explanation
Reduced force generation in elderly muscle tissue results from decreased excitation-contraction coupling efficiency because this mechanism is impaired during aging, leading to reduced calcium release and actin-myosin interaction. Therefore, force generation is diminished, rather than being caused by improved mitochondrial function or enhanced receptor sensitivity.
🏆 Up to £1,000 monthly prize pool
Ready for the live challenge? Join the next global round now.
*Terms apply. Skill-based competition.
Related Questions
Browse Human Body & Health →- A weightlifter attempts a deadlift with excessive lumbar rounding. Which failure mode becomes likely when the posterior ligamentous structures are subjected to prolonged tensile stress?
- A patient's skin graft fails to vascularize, leading to necrosis. Which mechanism explains why skin grafting outcome requires functional angiogenesis?
- As humans age, cellular antioxidant defenses decline; If a normally functioning liver cell experiences sustained oxidative stress due to this decline, which consequence follows?
- A woman experiences recurrent luteal phase defects (shortened post-ovulatory phase). Which hormonal mechanism explains why this condition disrupts endometrial receptivity?
- If a researcher introduces a telomerase inhibitor to cells undergoing division in vitro, which consequence follows for chromosome stability?
- If the cystic duct becomes blocked by a gallstone, which consequence follows regarding digestive processes?
